This is the Cox Models 2S LiPo Balancing Charger.

FEATURES: Economical and portable balance charger for 2-cell lithium polymer
            batteries only
          400mA maximum charge current requires no adjustment
          Twin LEDs indicate charging status and power

INCLUDES: ElectriFly 2S LiPo Balancing Charger

REQUIRES: A/C Power Supply - COXP5821

SPECS:    Input voltage: 11V-13.5V DC
          Battery types, # cells: 2 lithium-polymer cells connected in Series
            (7.4V) LiPo
          Charge current: 400mA maximum
          Status indicator: Two LEDs; one green, one red
          Case size: 1.89" x 0.83" x 2.66" (48 x 21 x 67.6mm)

COMMENTS: Charge only lithium-polymer (LiPo) rechargeable batteries that are
            2S (2 cells in series) 7.4V nominal voltage which have a balance
            connector.
          This charger does NOT include the AC adapter. COXP5821 must be
            purchased.
                                                                     lmm 2.9.11